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[brian at freeswitch.org]

Were they on hold for a bit?

/b

On May 7, 2009, at 10:04 AM, Helmut Kuper wrote:

[helmut.kuper at ewetel.de]

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Hello,


today a colleague of mine told me that sometimes calls were disconnected
without any obvious reasons. In FS's log I found this:

2009-05-07 15:52:22 [ERR] switch_rtp.c:1656 rtp_common_read() Error:
SRTP unprotect failed with code 7 (auth check failed)

I scanned my recent FS log files for that message and found that this
error accours a few times a week. I use Snom Phones all with G722 and
SRTP. Any ideas what this could be caused by?

regards
helmut

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[Prometheus001 at gmx.net]

Hello Helmut,

I also have problems with my Snom300s and Snom320s and G711 and SRTP.
They may be related to this problem, but I am not sure.
The phones disconnect the media stream after a while (2..10 minutes)
because the Snom media port is blocked all of a sudden.
I have opened a bug report at Snom [Ticket#2009040810000131].

Best regards
Peter

Helmut Kuper schrieb:

[helmut.kuper at ewetel.de]

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Hello Brian,

no, during conversations calls were desconnected.

regards
Helmut


On 07.05.2009 17:09, Brian West wrote:

[helmut.kuper at ewetel.de]

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Hello again,

I spent some more time investigating the problem. The scenario seems to
be always the same:

- -Phone A calls Phone B on PSTN (OpenZAP+Sangoma) via FS.

- -Call is established and Phone A has a (G722)SRTP connection to FS.

- -After a while (e.g. 14 minutes or 11 minutes or 10 minutes) a call
comes in for Phone A from Phone C via PSTN

- -FS tries to ring Phone A. Phone A response with "User Busy"

- -FS sends "User-Busy" via PSTN to Phone C.

- -Right after OpenZAP channel to Phone C is down, FS detects a "Error:
SRTP unprotect failed with code 7 (auth check failed)" (This happens
only if a total of 9 srtp errors occurs before)

- -Connection from Phone A to Phone B is unbridged by FS

- -PSTN-connection is disconnected with "NORMAL_CLEARING"


I analysed a time period of 5 weeks. By now I detect this problem only
for exact the scenario I described above. It seems that the problem
applies only to call durations >9-10 minutes and of course SRTP.

I'm on actual svn trunk.

regards
helmut



On 08.05.2009 11:29, Helmut Kuper wrote:

[helmut.kuper at ewetel.de]

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Hello again,

a further and last update for today:

Facing snom phones with different FWs with this scenario I found that
Snom 370 with FW 8.2.2 has no problems, while for Snom 370 with FW7.3.11
(I guess also below) I was able to reproduce the problem. So it seems to
be a Snom problem rather that a FS problem.


Have a nice weekend.

helmut


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[carlos.talbot at gmail...]

On Fri, May 8, 2009 at 9:31 AM, Helmut Kuper <helmut.kuper@ewetel.de (helmut.kuper@ewetel.de)> wrote:

[carlos.talbot at gmail...]

Nevermind. I figured it out. It's available as beta on the dms server.

http://wiki.snom.com/RSS#Release_candidates_7.3.19_and_8.2.2_can_be_downloaded_from_snom.27s_Document_Management_System_.28DMS.29


On Fri, May 8, 2009 at 10:18 AM, Carlos Talbot <carlos.talbot@gmail.com (carlos.talbot@gmail.com)> wrote:

[helmut.kuper at ewetel.de]

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Hello Carlos,


On 08.05.2009 17:31, Carlos Talbot wrote:

[helmut.kuper at ewetel.de]

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Hello,

I can reproduce the error with Snom 370 and FW 7.3.11. An update to
7.3.20 (beta) seems to solve the problem - at least I can't reproduce it
with the metioned scenario anymore.

regards
helmut
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